Introduction:

The RM-2 series is a modular, stackable GNSS RTK positioning solution based on the UM982 high-precision chipset.It is designed for robotics, autonomous systems, surveying equipment, and other applications requiring centimeter-level positioning and optional heading capability.Unlike single-board RTK modules, RM-2 adopts a flexible module architecture, allowing users to build mobile rovers, base stations, or integrated One-Base solutions according to project requirements.

Features:

1. Centimeter-Level Positioning Accuracy: RTK horizontal accuracy: 0.8 cm + 1 ppm;RTK vertical accuracy: 1.5 cm + 1 ppm.Supports fast RTK convergence and stable long-term operation.
2. Multi-Constellation, Multi-Frequency GNSS: Supports GPS, BDS, Galileo, GLONASS, QZSS,Multi-frequency GNSS tracking (including L1/L2/L5 and corresponding signals),Improved availability and robustness in complex environments.
3. Modular & Stackable Design: Core GNSS module can be combined with:Mobile (Rover) module,Base station module,4G communication module,Long-range radio module (up to 5 km),Modules are stackable, simplifying configuration changes and maintenance.
4. Optional Dual-Antenna Heading Capability: Supports dual-antenna RTK heading when configured,suitable for unmanned vehicles and robotic platforms requiring precise orientation feedback.
5. Integrated Wireless & Networking: Built-in WiFi hotspot capability,supports RTK correction data transmission between devices,enables convenient field configuration and diagnostics.
6. Developer-Friendly Integration: Standard interfaces: UART, USB, PPS, I²C,Open communication protocol,available ROS, Python, and C/C++ drivers,suitable for rapid system integration and secondary development.

Application:

① FUll-star Full-frequency:BDS,GPS,GLONASS,Galileo,QZSS,SBAS
② Centimeter - level precision:Horizontal accuracy: 0.8 cm + 1 ppm Elevation accuracy: 1.5cm+1ppm
③ 60dB Narrowband Anti-interference: Robust anti-interference design ensures stable performance even in complex electromagnetic environments.
④ DUAL-RTK Engine :Dual-antenna independent processing with cross-verification significantly enhances reliability.
⑤ RTK KEEP Technology:Maintains positioning continuity even when the differential link is interrupted
⑥ Hot-start mechanism:Equipped with a built-in uninterruptible power supply system, enabling rapid entry into RTK mode even after a 2-4 hour power outage.

Self Built Base Station + Radio Modem:
Widely applicable to UAVs,UGVs,robotics,and various other scenarios.
 
① One Base
② Base Station (Two Base Station Options Available)
③ Radio Modem
④ Mobile
⑤UAVs/UGVs

Self-Built Base station + Reusing UAV Transceiver Radio:Exclusively for UAV applications
 
①OneBase
②Base Station(Two Base Station Options Available)
③Mobile
④Flight Controller
⑤Integrated SPI Receiver

Modular Design

Features a stackable, modular design incorporating mobile units, base station units, 4G communication modules, 5-kilometer radio modules, Wi-Fi hotspots, and other components.

 

① Mobile
② Base/one Base Station Two Base Station Options Available
③ 4G Modem
④ Radio Modem
For specific usage scenarios and configuration options, please refer to the "selection Guide"section above
 

① Quadrifilar Helix Antenna
② MMCX Interface
③ GH 1.25 4pin
④ SMA Interface
⑤ Status Indicator 6 GH1.25 7Pin
⑦ USB Type-C
⑧ Mobile
⑨ Radio Module
⑩ USB Type-C
⑪ SIM Card Slot(For 4G Module
 
The interface and fixed mode between the base station end andthemobile end are consistent.

Extensive Interface Configuration

Integrated Type-C (combined power delivery/debugging/communication), dual serial ports (4-pin basic communication + 7-pin flight controller interface), PPS precision timing, and I²C direct connection to magnetic compass.

① GH1.25 4Pin UART
② Type-C
③ GH1.25 7Pin UART (I²C Magnetic Compass)
④ Power Supply
⑤ TTL Communication
⑥ Communication
⑦ Debugging
⑧ PPS Timing
⑨ Magnetic Compass

Multiple Communication Methods

Supports direct connection via radio and hotspot networking, and Python API  offering flexible adaptation to diverse scenarios.
 

① Networking via Radio Modem with a Self-Built Base Station
② RTK Rover Unit on
For detailed usage instructions, please refer to the Model Selection Recommendations section above.

Built-in Magnetic compass
Features an integrated IsT8310 magnetometer chip that connects directly to Pixhawk drone flight controllers,enabling high-precision positioning and heading measurement.
 
① Directly connectable to Pixhawk drone flight controllers

WiFi Hotspot Networking

The base station incorporates a built-in WiFi hotspot for wireless connectivity, enabling UDP-based sharing of RTCM differential data packets.Multiple Mission Planner or QGC ground stations can be paired with remote controllers to achieve drone swarm positioning.

Secondary Development
Provides ROS, Python, and C++drivers for easy access to data such as latitude, altitude, longitude,velocity, and heading, enabling, rapid secondary development

Integrated Base Station
Optional integrated base station combines the base unit, battery, mushroom-head antenna, and tripod into one compact unit. Offers 8 hours of battery life, lightweight and portable, ready to use right out of the box.

Application:

 

(1) Intelligent Drones
(2) Intelligent Autonomous Vehicles
(3) Engineering Construction
(4) Smart Transportation
(5) Smart Agriculture
(6)Topographic Surveying

1 UAV
2 Autonomous vehicles
3 Agricultural machinery
4 Surveying equipment
Multi-Platform Compatibility
Native support for diverse application scenarios including drones, autonomous vehicles, robots, agricultural machinery, surveying and mapping, and environments without CORS services